Amazon.com : Samyang 500mm Mirror F8 T Mount Manual Focus Lens : Electronics
Samyang Quantaray MC 500mm f8 Mirror Lens for M4/3 Mount Camera Body | eBay
USED] Samyang 500mm MC IF f/6.3 Telephoto Mirror Lens (Samyang T Mount for Pentax K Mount Included) (S/N: F411G0114) (Excellent Condition!) - USED Lenses - ShaShinKi